When sending SMS through SMSGatewayCenter, you’ll encounter two key categories under transactional messaging: Service Explicit SMS and Service Implicit SMS. These terms, defined by TRAI (Telecom Regulatory Authority of India) guidelines, determine how messages are classified and delivered, especially to DND (Do Not Disturb) registered numbers. Here’s what they mean and how they differ:
Service Explicit SMS: #
- Definition: Service Explicit SMS refers to transactional messages sent to users who have explicitly opted in to receive communications from a specific business or service. This opt-in is typically documented (e.g., via a form, app, or subscription).
- Purpose: These messages are tied to a direct, user-initiated relationship, such as account updates, payment confirmations, or order statuses.
- Delivery Rules: They can be sent to non-DND numbers or DND numbers only if the user has given clear consent for that specific service. Without consent, delivery to DND numbers is blocked.
- Example: “Your order #12345 has been shipped. Track it here: [link]” (sent to a customer who subscribed to order updates).
Service Implicit SMS: #
- Definition: Service Implicit SMS covers transactional messages that don’t require explicit user opt-in but are still essential to a service the user has engaged with. Consent is “implied” based on the user’s interaction with the business.
- Purpose: These are critical, non-promotional messages like OTPs (one-time passwords), booking confirmations, or service alerts tied to an ongoing transaction.
- Delivery Rules: These messages can be delivered to both DND and non-DND numbers, as they’re deemed necessary for the user’s service experience, per TRAI regulations.
- Example: “Your OTP to verify your login is 456789. Valid for 5 minutes.” (sent during a login attempt).
Key Differences: #
| Feature | Service Explicit SMS | Service Implicit SMS |
|---|---|---|
| User Consent | Explicit opt-in required | Implied consent from usage |
| DND Delivery | Blocked without consent | Allowed for essential messages |
| Use Case | Opted-in updates | OTPs, critical alerts |
| Approval Category | Service Explicit on DLT | Service Implicit on DLT |
How to Use Them on SMS Gateway Center: #
To ensure smooth delivery, categorize your messages correctly on the DLT (Distributed Ledger Technology) platform:
- Register Service Explicit SMS for updates requiring user permission.
- Use Service Implicit SMS for OTPs and urgent notifications to reach all users, including those on DND.
For more in-depth details, check out our comprehensive guide on SMS types at SMS Types Explained. Need help setting up? Log in to SMSGatewayCenter and start sending the right SMS for your audience today!